EREMA Haken

PELLETISING

 
  • HG D: Hot die face pelletising systems with Direct Drive technology
  • HG Air: Hot die face pelletising systems with air technology
  • ASP: Semi-submerged strand pelletising systems for low-viscosity thermoplastics
 
HGD_HG_GS_GZ_TMS.jpg
 

HG D

Hot die face pelletising systems with Direct Drive technology

 

Simple handling and maintenance have always been the trademarks of EREMA hot die face pelletising systems. 

Ongoing development of Direct Drive technology has added even more operational reliability, ease of use and flexibility. 

 
2.jpg

Technical benefits

 
  • Direct Drive technology with vibration-free design
  • Lifetime lubrication of the drive shaft
  • Very long pelletiser service life thanks to special cutting geometry and automatic pneumatic knife pressure
  • Automatic pelletiser function supervision with alarm signal and automatic shutdown in the event of a malfunction
  • Optional automatic pelletiser speed adjustment control ensures reliable operation with constant pellet size, even with fluctuating melt throughput

Economic benefits

 
  • Suitable for use with virtually all standard extruders
  • High degree of operational reliability and considerable reduction in maintenance costs
  • Simple and rapid pelletiser knife changeover without adjustment work saves time
  • Flexible configuration of equipment downstream of pelletiser
  • Reduced cooling water costs thanks to efficient pellet cooling system
 

HOW IT WORKS

HG D

1 2 3 4
  1. Pelletiser die face:

    The melt emerging from the holes in the heated pelletiser die face (1) are cut off by rotating knives (2).

  2. Knives:

    The melt emerging from the holes in the heated pelletiser die face (1) are cut off by rotating knives (2).

  3. Water ring:

    The pellets are flung outward by the centrifugal force into a rotating water ring (3).

  4. Cooling water:

    This cools the pellets and transports them via a flexible discharge channel to the to the pellet water removal screen (4).

 

The melt emerging from the holes in the heated pelletiser die face (1) are cut off by rotating knives (2). The pellets are flung outward by the centrifugal force into a rotating water ring (3). This cools the pellets and transports them via a flexible discharge channel to the to the pellet water removal screen (4). The pellets pass through the oversize particle separator to the drying centrifuge. They are then conveyed in a stream of air through a transport duct to the silo or bagging station. The cooling water circulates in a closed circuit and is fed back to the pelletising head through a cooling water filtering system and a heat exchanger using a water pump.

 

HG D: DIRECT DRIVE TECHNOLOGY

  • Maintenance-free and smooth action of knife head pressure
  • Knife head drive shaft with direct drive
  • Outstanding cutting precision in combination with fully automatic pneumatic cutting pressure setting
  • Pelletiser knives and die face have a long service life

HG D: IMPROVED
DOWNSTREAM COMPONENTS

 

  • optimised pellet water removal screen with self-cleaning effect and easy-change filter cartridge and fine particle screen 1
  • pellet centrifuge for enhanced drying performance featuring Direct Drive technology
  • blower and noise protection integrated in pellet centrifuge housing – compact downstream components
  • folding housing cover on pellet centrifuge for simple cleaning when changing colours and straightforward maintenance 2

HG AIR

Hot die face pelletising systems with air technology

 

Robust implementation proven again and again. For automatic repelletising of different thermoplastic materials, compounds and wood/plastic composites (WPC). 

The series HG AIR 80K, HG AIR 120K, HG AIR 120 and HG AIR 240 set new standards in terms of operational reliability, straightforward operation and flexibility.

 
4.jpg

Technical benefits

 
  • Robust, compact design
  • Air as transport / cooling medium
  • Easy handling

Economic benefits

 
  • Simple and fast pelletiser knife changeover
  • Air cooling requires less infrastructure
  • High operational reliability

 

 

ASP

Semi-submerged strand pelletising systems
for low-viscosity thermoplastics

 

EREMA's semi-submerged strand pelletising systems are used to pelletise technical thermoplastics such as PET. Straightforward operation and minimum labour requirements contribute to the very high degree of operational reliability.

Easy start-up, fast cleaning when changing over material and automatic self-feeding if strand breaks occur make these systems indispensable. Integrated crystallisation is also possible for PET.

 
asp_new.jpg

Technical benefits

  • Easy start-up with no bypass valves and lowest possible material loss 
  • Fully automatic self-feeding if strand breaks occur 
  • Cooling water removes cutting dust 
  • Adjustable spray heads for the effective cooling of the polymer strands 
  • Optional CIC (Compact Inline Crystallisation) for the integrated, energy-efficient and compact crystallisation of PET or PLA

Economic benefits

  • Cylindrical pellets on a par with virgin material 
  • Reduced wear on tooling thanks to wet cutting 
  • Minimum personnel costs thanks to easy operation and fast cleaning and maintenance of the easily accessible components of the complete system 
  • Avoiding downtime caused by strand breaks increases productivity 
  • Extremely reliable and operator-friendly
 

How it works

ASP

 
1 2 3 4 5 6 7
  1. Strand die :

    The melt strands coming through the boreholes of the heated die head (1) are conveyed to a horizontally and vertically adjustable water chute (2). 

  2. Strand cooling water chute:

    The melt strands coming through the boreholes of the heated die head (1) are conveyed to a horizontally and vertically adjustable water chute (2)

  3. Strand pelletiser:

    The strands are cooled by a laminar flowing film of water and manually adjustable spray nozzles. They are cooled down to such an extent that they do not lose their shape in the subsequent strand pelletiser (3)

  4. Cooling piping:

    After it passes through the cooling piping (4) the transport water and any fine particles which it may have are removed from the pellets in the pellet water removal screen (5). 

  5. Pellet water removal screen:

    After it passes through the cooling piping (4) the transport water and any fine particles which it may have are removed from the pellets in the pellet water removal screen (5). 

  6. Oversize particle screen:

    They then move on via an oversize particle screen (6) to the centrifuge for the final drying process.

  7. Centrifuge:

    They then move on via an oversize particle screen (6) to the centrifuge (7) for the final drying process.

 

The melt strands coming through the boreholes of the heated die head (1) are conveyed to a horizontally and vertically adjustable water chute (2). The strands are cooled by a laminar flowing film of water and manually adjustable spray nozzles. They are cooled down to such an extent that they do not lose their shape in the subsequent strand pelletiser (3). The strands retain enough core heat to effectively support the later drying process on the vibration screen and enable crystallisation if required.

If there are any torn or interrupted strands the laminar water flow refeeds them to the strand pelletiser fully automatically and without any external operator intervention.

After it passes through the cooling piping (4) the transport water and any fine particles which it may have are removed from the pellets in the pellet water removal screen (5). After filtration and cooling the water is returned to the process water circuit. The latent residual heat of the pellets continues the drying process on the pellet water removal screen. They then move on via an oversize particle screen (6) to the centrifuge (7) for the final drying process.

 
 

FOR ASP: IMPROVED DOWNSTREAM COMPONENTS

  • Optimised pellet water removal screen with self-cleaning effect and easy-change filter cartridge 
  • Pellet centrifuge for enhanced drying performance featuring Direct Drive technology, integrated blower, noise protection and folding housing cover 
  • Easy to clean if there is a colour change and maintenance is straightforward 
  • Compact downstream components 2

ASP-CIC

Compact Inline Crystallisation

 

A system for the integrated and energy-efficient crystallisation of PET or PLA. The melt-filtrated strands are cooled briefly in water and then cut into pellets. The material is then fed immediately into a container.

The latent thermal energy inside the pellets is used for crystallisation – without additional energy input required from the outside and without interrupting the process.

ASP_CIC_new.jpg

Technical benefits

 
  • Homogenous pellets in terms of properties such as degree of crystallisation, pellet geometry, pellet weight, colour, etc. 
  • The degree of crystallisation achievable is between 30 and 40 % 
  • Trace elements are reduced without influencing the IV 
  • No sticking occurs, thanks to the careful and homogeneous crystallisation over the whole cross section

Economic benefits

 
  • Low production costs because no additional energy is needed 
  • Easy operation and low personnel costs thanks to the high degree of automation

HOW IT WORKS

ASP-CIC

1 2 3 4 5 6 7
  1. Strand die:

    The melt strands coming through the boreholes of the heated die head (1) are conveyed to a horizontally and vertically adjustable water chute (2).

  2. Strand cooling water chute:

    The melt strands coming through the boreholes of the heated die head (1) are conveyed to a horizontally and vertically adjustable water chute (2).

  3. Strand pelletiser:

    The strands are cooled by a laminar flowing film of water and manually adjustable spray nozzles. They are cooled down to such an extent that they do not lose their shape in the subsequent strand pelletiser (3).

  4. Centrifuge:

    After the strand pelletiser the surface moisture is removed in the centrifuge (4).

  5. Crystallisation unit:

    The amorphous pellets are crystallised in the crystallisation unit (5) using the residual core energy.

  6. Conveyor screw:

    A vertical conveyor screw (6) moves the major part of the crystalline pellets into the post-crystallisation unit (7).

  7. Post-crystallisation unit:

    A vertical conveyor screw (6) moves the major part of the crystalline pellets into the post-crystallisation unit (7).

The melt strands coming through the boreholes of the heated die head (1) are conveyed to a horizontally and vertically adjustable water chute (2). The strands are cooled by a laminar flowing film of water and manually adjustable spray nozzles. They are cooled down to such an extent that they do not lose their shape in the subsequent strand pelletiser (3). The strands retain enough core heat to effectively support the later drying process on the vibration screen and enable crystallisation if required.

After the strand pelletiser the surface moisture is removed in the centrifuge (4). The amorphous pellets are crystallised in the crystallisation unit (5) using the residual core energy. A vertical conveyor screw (6) moves the major part of the crystalline pellets into the post-crystallisation unit (7). A small portion is returned to prevent the still amorphous pellets from sticking. Thanks to the integrated weight sensor, the system is controlled completely automatically. Non-conforming pellet sizes are removed at the classification screen. A transport blower then moves the pellets to the next step.

Impressions

Pelletising

 

EREMA DOWNLOAD CENTRE

Folder

ASP
HG AIR
HG D
Back to top